* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

a {
    display: block;
    text-decoration: none; // 继承父元素的字体颜色  div一样 
    color: inherit;
}

img {
    // 3px
    display: block; // 让图片的大小由父元素来控制
    width: 100%;
}

ul {
    list-style: none;
}

.clearfix::after {
    content: "";
    display: block;
    height: 0;
    line-height: 0;
    visibility: hidden;
    clear: both;
}

input,
button {
    border: none;
    outline: none;
}

.footer {
    height: 110px;
    background-color: #efefef;
    .footer-top {
        display: flex;
        height: 40px;
        justify-content: space-between;
        line-height: 40px;
        >a {
            width: 100%;
            text-align: center;
            border: 1px solid #ccc;
            box-sizing: border-box;
            border-right-color: #efefef;
        }
    }
    .footer-bottom {
        text-align: center;
        padding-top: 20px;
        >a {
            color: red;
            font-size: 16px;
            display: inline;
        }
        >span:nth-of-type(1) {
            color: #000;
            font-size: 16px;
        }
        >span:nth-of-type(2) {
            color: #ccc;
            font-size: 16px;
        }
        >p {
            color: #aaa;
        }
    }
}